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package interceptor;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * <p>Designates an interceptor method that receives a callback when
 * the target class constructor is invoked.
 * </p>
 * <p>The method to which this annotation is applied must have one of the 
 * following signatures.
 * </p>
 * 
 * <pre>
 * &#064;AroundConstruct
 * public void &#060;METHOD&#062;(InvocationContext ctx) { ... }
 * </pre>
 * 
 * <pre>
 * &#064;AroundConstruct
 * public Object &#060;METHOD&#062;(InvocationContext ctx) throws Exception { ... }
 * </pre>
 * 
 * <p>An <tt>AroundConstruct</tt> interceptor method may be only declared on an interceptor class.</p>
 *
 * <p>An interceptor class must not declare more than one <tt>AroundConstruct</tt> 
 * method.</p>
 * 
 * <p><tt>AroundConstruct</tt> methods may throw runtime exceptions, 
 * but not checked exceptions.
 * </p>
 *
 * <p> The target instance is created and its constructor injection is performed, if applicable, 
 * when the last interceptor method in the <tt>AroundConstruct</tt> interceptor chain invokes 
 * the {@link InvocationContext#proceed()} method.
 *
 * <p>An <tt>AroundConstruct</tt> interceptor method should exercise caution accessing the instance which 
 * constructor it interposes on.</p>
 *
 * @since Interceptors 1.2 
 */
@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
public @interface AroundConstruct {
}
